Do You Know
Questions & Answers on General Knowledge.
Why are batteries so expensive?
They contain highly purified and refined chemicals and are actually marvels of engineering. It's more surprising to me that they are so cheap, given how complicated they are to make.
Why is America called a "melting pot"?
Why does popcorn pop?
Can mountains grow and shrink?
Why are construction cranes and the mechanisms used for drilling oil called “derricks”?
How big is the Grand Canyon?
What are insulae?
Do birds of prey have special wings?
What materials are magnets made of?
How are magnets made and what are they made of?
What is thermodynamics?
What is a learning disability?
How many explorations have been made to Jupiter?
Why doesn't the file cabinet move when you push even a little - you're making the net force greater than zero?
Are some musical instruments really made of vegetables?
How does a fan compare to a propeller? Why does a fan blow air while a propeller has "lift"?
What were the earliest fish like?
Why are pigs so dirty?
I don't understand the horizontal component of a ball thrown downfield. Does it have constant velocity and/or acceleration, even at the start?
Why is it that when you stand in front of a flat mirror, your image is reversed horizontally (left-right) but remains the same vertically (up-down)?
Why does regular water freeze faster than salt water?
Is a siamang also an ape?
What languages are spoken in North America?
How is AC current (alternating current) made?
Where does the Sun shine the most?
Who were Gabriel Fahrenheit and Anders Celsius?
Daily English Test
101 Traps and Puzzles
101 Ideas to Make Happy Lifelong Relationship
101 Save Money Ideas